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TI rolls out four sensing circuits for industrial apps

09 Sep 2014

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TI's sensing circuits

Texas Instruments (TI) expanded its portfolio of sensing integrated circuits (ICs) with four new devices that allow engineers to accurately sense key parameters in tight spaces with very low power. These new products provide solutions for temperature, humidity, ambient light, and capacitive sensing in a host of industrial and enterprise applications.

Contactless, infrared temperature sensing

The TMP007 is a highly integrated, non-contact infrared (IR) temperature sensor, joining TI's family of the world's smallest thermopile sensors. It features an integrated math engine, which performs calculations on-chip for direct reading of the object's temperature, and delivers low power consumption of only 675uJ per measurement. Measuring only 1.9mm x 1.9mm x 0.625mm, the sensor allows designers to monitor temperature in space-constrained industrial applications, including protection relays and process control equipment, and other factory and building automation applications, as well as enterprise equipment, such as laser printers and network servers.

Integrated humidity and temperature sensor

Designers of building control equipment can implement accurate, energy-saving climate control in small spaces, while designers of home appliances and consumer goods can easily add humidity sensing capabilities to their products with the HDC1000 integrated humidity and temperature sensor. TI's humidity sensor provides high accuracy and low power in a small, dust-resistant package. The HDC1000 consumes only 1.2uA of average current when measuring relative humidity and temperature at 11bit resolution, once per second. This low current can extend battery life in remote applications. The sensor's 2mm x 1.6mm wafer level chip scale package (WLCSP) simplifies board design and minimises system size. In addition, the innovative placement of the sensing element on the bottom of the device provides resistance to dust, dirt, and other environmental contaminants.

Precise ambient light detection

The OPT3001 is a precision ambient light sensor tuned to closely replicate the human eye's photopic response. With its industry-leading spectral response, the sensor can deliver greater than 99 per cent IR rejection, to provide consistent light metering regardless of the light source. At 2mm x 2mm x 0.65mm and supports down to 1.6V at typical operating current of 2uA, the ambient light sensor can be used for a variety of battery-powered applications. Additionally, the OPT3001 enables measurement over a 23bit effective dynamic range, giving designers the high resolution needed for enterprise, lighting control, and building and factory automation applications. The new ambient light sensor is compatible with TI's Sensor Hub BoosterPack.

High-performance capacitive sensing

The four-channel FDC1004 capacitance-to-digital converter combines unique features and functions with low power and 16bit noise performance, over a range of ±15pF, which makes it easy for designers to use capacitive sensing to increase the intelligence and awareness of their systems. The device can support an offset capacitance of up to 100pF, allowing for remote sensing in harsh environments or where electronics cannot be located. It includes a strong shield driver to help minimise interference, to help focus the sensing direction, and to reduce the impact of temperature variations on system performance. The FDC1004 can be used in many applications like proximity wake-up sensing, material analysis, and liquid level sensing. It is compatible with microcontrollers (MCUs), such as the MSP430 MCUs.

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